baber/WOPTO huggingface dataset:
Patent GB-512222-A (GB)
Title: Improvements in the manufacture of alloy steel tubes
IPC: B23K11/06
Filed: 1938-12-30
Abstract: 512,222. Welding. SEUTHE, A., and STIEHL, F. Dec. 30, 1938, Nos. 37912 and 37913. Convention dates Dec. 31, 1937, and Dec. 12, 1938. [Class 83 (iv)] In electric welding the seam of a tube of alloy steel such as chromium or chromiumnickel steel or steel containing molybdenum; titanium &c., the tube is fed at a high speed under electrodes, which have a narrow contact area at each side of the seam and are subjected to pressure high enough to squeeze up thick burrs at the joint so as to extrude oxides &c. therefrom. The tube may be fed at twice the speed, the contact area may be half or third. and the pressure four times to six times as great, as compared with a similar process for welding ordinary steel tubes. ' The speed may be from 2 to 145m. per minute, the width of the contact area may be from one tenth of the tube diameter for large tubes, e.g., 100 m.m. diameter, one fifth of the tube diameter for tubes of, say, 20 m.m. diameter and the pressure may be between 300 and 1.500 kgs. The tube a is fed by driven rolls c, d, part disc electrodes e, f, which may be of sintered copper or hard copper alloy, separated by an insulating disc so as to leave a space g for the burr x. Cooling may be effected by flattened tubes h containing fluid. A tube of alloy steel containing 14 per cent of chromium, of 25 m.m. diameter and 1.7 m.m. in thickness may be fed 7.5 m. per minute, a current of 19,000 amps at a voltage of 1.85 being supplied. If fed at 12 m. per minute a voltage of 26 and amperage of 21,500 may be used. The blank may be welded immediately after the cutting and bending, or the joint may be treated with "Vaseline" (R.T.M.) or the like while awaiting welding. In another form the electrodes are separated by an insulating disc p, Fig. 3, and may be secured by screws s to bronze carriers o<1>, o<2>, held together by insulated screws t, the carriers being driven if necessary. Water may be injected from a tube w' through the carriers and pass through exit tube w<2>. The electrodes e, f, Fig. 4, have arcuate contact faces of a radius greater than that of the tube so that linear contact at A is obtained when cold, but during welding the pressure bends the tube to obtain a larger area of contact A, B, the maximum current density being at the seam. The width of the faces is about twice that of the contact width so as to form channels for cooling.
Patent GB-623076-A (GB)
Title: Improvements in or relating to thread winding or reeling machines
IPC: B65H59/04
Filed: 1946-12-24
Abstract: 623,076. Unwinding thread. BARBER, H. Dec. 24, 1946, No. 37924. [Class 120 (ii)] A tensioning device for the thread unwinding from a cake &c A, supported on a plate B rotated by the pull of the thread, comprises a two-armed lever E pivoted at e. one arm e<SP>2</SP> carrying a thread-guide f and roller F, supported by the pull in the thread t, and the other arm e<SP>1</SP>, lighter than the arm e<SP>2</SP>, carrying. a brake pad e<SP>5</SP> and an adjustable counterweight e<SP>3</SP> When the thread becomes slack, the arm e<SP>2</SP> will fall and apply the brake e<SP>5</SP> to the plate B to restore the thread tension to normal. The cake A is centred on the plate B by pairs of arms d<SP>1</SP>, d2, d3 (not shown) d<SP>4</SP>, spring-urged in right-angular relationship, carried by the spindle C and the sleeves d.
Patent GB-363508-A (GB)
Title: Improvements in automatic photographic machines
IPC: G03B17/53
Filed: 1930-12-17
Abstract: 363,508. Automatic photographic. apparatus. PHOTOGRAPHIC WEIGHING'MACHINES, Ltd., Exhibition Grounds, Wembley, Middlesex, and BURLEIGH, D. S., Brownswood Works, G.N. Railway Yard, Hornsey Road, London. Dec. 17, 1930, No. 38047. [Class 98 (i).] Relates to automatic apparatus wherein the arrival of a negative at the exposure gate of a copying camera starts the operation of the camera, and comprises a mechanically-operated clutch mechanism for connecting the feed mechanism of the copying camera to a constantly-running mechanism consisting of a balanced lever having an arm which is encountered and displaced by the incoming negative causing a gear segment on the lever to engage a friction-driven gear wheel which forcibly displaces the lever and frees a one-revolution clutch, a cam restoring the lever after one revolution. As shown, the negative passes through constantly-driven, waisted feed rolls c<1>, c<2> on to a supporting surface b below the positive camera which is carried by cheek plates a. A roller e on a shaft f is formed with serrations e<1> to position the negative for copying and to deliver it to rolls d<1>, d<2>. The negative engages a projection r<2> on a balanced lever r, causing a segment s to engage with a constantly-running gear c<1>, whereupon the lever r is forcibly turned and, through an arm q and chain o, rocks a cranked lever n and frees a forked lever l carried by a disc g fast with the shaft # ; the lever l is then forced outwardly by a spring and forces a pawl h into engagement with a constantlyrunning ratchet wheel causing rotation of the shaft f and operation of the camera. After one revolution, the lever r is restored by a roller v engaging a cam surface w, and a spring restores the lever n into the path of the lever l.
Patent GB-1244731-A (GB)
Title: Improvements in or relating to trolleys for facilitating the handling and movement of articles and particularly heavy articles
Inventor: JOHNSTONE GEORGE BERNARD
IPC: B65G67/20
Filed: 1968-08-09
Abstract: 1,244,731. Low-lift trucks. JOLODA TRANSPORT EQUIPMENT Ltd. 21 July, 1969 [9 Aug., 1968], No. 38151/68. Heading B8H. A low-lift truck comprises a load support 13 provided on its underside with cams 14 which are supported on rollers 15 on bogies 10 connected together in tandem by links 11, whereby relative horizontal movement between the load support and the bodies causes raising and lowering of the load support. As shown, this relative movement is produced, against the action of a spring 18, by an hydraulic ram 28 which, at one end, is pivoted to a bogie 10 and, at the other end, is mounted in a housing 17 which is pivoted at 17a to side walls of the load support. The housing 17 includes a pump for supplying fluid to the ram, the pump being actuated by a handle 23 which may also operate a pressurerelease valve for lowering the load support. The truck may be coupled to a similar extension unit 32 by means of hooks 33, 34 and connections 37, 38, whereby the load support of the extension unit is raised and lowered with the load support 13. Two or more trucks, with or without extension units 32, may be arranged to run in parallel side-by-side arrangement. They may be connected together or they may run in parallel tracks, Figs. 5-7 (not shown), on the floor of a vehicle, transport container or building.
Patent GB-323550-A (GB)
Title: Improvements in dynamo electric machines
IPC: H02K13/14
Filed: 1928-07-03
Abstract: 323,550. Platen, B. C. von, and Reiland, L. A. G. July 3, 1928. Divided on 323,498. Machines with two or more armatures; commutators.-In a continuous-current machine with at least two separate stationary armature windings carried by axially displaced stator parts and a rotary field members comprising axially displaced north and south poles, as described in Specification 323,498, commutation is improved by means of an auxiliary armature and field member, the main current of the machine being used to magnetize the auxiliary field. Fig. 2 shows in section a machine of which the complete connections are shown in Fig. 1. The auxiliary armature poles are formed on the commutator housing 41 and consist of two sets of stationary cores 42, 42<1> co-operating with two rotating pole members 47, 47<1> which are constructed and excited in a manner similar to that of the main pole member N, S as described in Specification 323,498. The stator members 42, 42<1> are relatively displaced by an angle of 90‹ and the rotor members 47, 47' by an angle of 45‹. The stationary cores 42, 42<1> are respectively provided with windings 44, 46 carrying currents from the corresponding main stator halves B, A of the machine and with windings 43, 45 which carry the total output current. The action of the auxiliary armatures and fields is to inject a commutating voltage into the circuits of the main generating windings 1, 2, 3, 4 which, by means of brushes (not shown) and slip-rings 50, 51, 52, 53 are connected to the main commutators 54, 55 and the terminals K, K<1> of the machine.
Patent GB-876857-A (GB)
Title: Improvements in or relating to rotary vacuum pumps
IPC: F04C18/344
Filed: 1957-12-10
Abstract: 876,857. Rotary vane vacuum pumps. BASIC PRODUCTS CORPORATION. Dec. 10, 1957 [Dec. 11, 1956], No. 38298/57. Class 110(2). The chamber of a rotary vane pump has the profile of two intersecting circles providing a seat 18 for the rotor 21 and an eccentric bore 16 having an inlet 62 and an outlet 64 having a ball valve 67 connected to a tube 65 opening above the oil level in a reservoir 51. The reservoir communicates by a passage 52, passages 54 in the stator ring 13 and passages 55 in end plates 22, 23 with recesses 56 in the rotor 21. The vane slots 33 have axial grooves 41 which communicate with annular grooves 42, and part annular grooves 43 in the end plates 22, 23. The grooves 43 communicate with a port 84 in the pump chamber and the grooves 42 with a port 75 in a lower pressure part of the chamber. Grooves 71, 82 in the seat 18 communicate with the grooves 43, 42 respectively. Packing ring grooves 94 also communicate with the port 84. Sealing oil flowing from the reservoir 51 to the recesses 56 and so to the other grooves and passages is degassed by the connections 84, 75 to the pump chambers so that noise caused by sudden degassing is eliminated. The clearance between the seat 18 and rotor 21 is adjustable. Sealing oil may be supplied to the contacting faces of the end plates 22, 23 and the stator 13. The vanes 34 are loosely connected by pins 36 which pass through the drive shaft 31. Two pumps may be connected in series.
Patent GB-1062686-A (GB)
Title: Smoothing iron
IPC: D06F75/22
Filed: 1965-09-08
Abstract: 1,062,686. Spray-producers. HOOVER Ltd. Sept. 8, 1965 [Sept. 17, 1964], No. 38392/65. Heading B2F. [Also in Division D1] An electric flash boiler type steam iron has a coating, e.g. of aluminium, secured to the top of the reservoir and comprising a passage 28 leading from a filling port at the front of the iron to the reservoir, a bore 29 receiving a control rod 30 for the flash boiler valve 17 and a bore 35 forming an inlet passage from the reservoir through a check valve 38 to a pump cylinder containing a piston 46 and connected by an outlet passage 56 to a spray nozzle 50. Piston 46, e.g. of synthetic plastic, is biased upwardly and has protrusions 49 which engage beneath a portion of the handle 24 to hold the piston in the bore. The spray head 50 has a downwardly inclined orifice 50A and comprises a ball valve 72 biased by a spring engaging a disc 53 with arcuate peripheral recesses (54) Fig. 4 (not shown). In operation, piston 46 is depressed and raised to draw water from the reservoir past a ball valve 36 and on being depressed again forces the water out past ball valve 72 and through recesses 54 to leave orifice 50A as a fine spray.
Patent GB-367969-A (GB)
Title: Method of sweetening petroleum products
IPC: C10G19/06
Filed: 1930-12-22
Abstract: <PICT:0367969/III/1> Petroleum oils containing mercaptans and similar sulphur compounds, are "sweetened" by adding sulphur and a reagent containing an alkali metal hydroxide, a lead compound such as lead oxide, nitrate, acetate or carbonate, and an alkaline earth hydroxide.  The reagent may be mixed with an inert material such as powdered coke, sepiolite, clay or infusorial earth, and used as a dry powder, or incorporated with oil or water to form a slurry.  The crude oil is drawn through a pipe 14, by a pump 11 and is circulated through a pipe 12, a tank 10 and a pipe 13.  A mixture of lithium, potassium or sodium hydroxide, water, calcium hydroxide clay and lead monoxide is then added through the pipe 14, to form a uniform mixture with the oil.  A quantity of the oil to be treated together with a little powdered sulphur is admitted to the tank 10 containing a small amount of the previously prepared reagent, and the mixture is then circulated through the pipe 12 &c.  The liquid is allowed to settle in the tank 10 and the purified oil is drawn off through the pipe 13 and passed into a filter 15, having an inner chamber surrounded by cloth.  The oil filters into the outer chamber and is discharged therefrom through a pipe 17.  The filter 15 may be replaced by a settling chamber or a centrifuge.  In a modification, a tank is provided containing a solution of the sulphur dissolved in oil.  The mercaptans are stated to be converted into disulphides which may be separated by distillation.  The lead sulphide formed in the process is decomposed by the calcium hydroxide and sodium plumbite is regenerated.
Patent GB-1426376-A (GB)
Title: Production of relief printing plates
IPC: G03F7/20
Filed: 1973-08-17
Abstract: 1426376 Photographic processes ASAHI KASEI KOGYO KK 17 Aug 1973 [18 Aug 1972] 38915/73 Heading G2C Relief images are produced by exposing a photopolymerizable (p/p) material 0.1-5mm thick and with a refractive index (R.I.) of 1.45 to 1.51 to a transparency and through a self-supporting transarent film placed on the p/p material, the film being 0.001-0.1mm thick and having an R.I. of n wherein n is equal to, or 0.02 greater or smaller than, the R.J. of the p/p material, removing the film after exposure and then removing the non- exposed areas of the p/p material by washing. Specified transparent films are polypropylene, polyvinyl alcohol which may be esterified and/or etherified, cellulose acetate, polyvinyl chloride and polymethylmethacrylate. In the examples, a photopolymerizable composition of an unsaturated polyester, monomer, photoinitiator, optionally polyvinyl alcohol and inhibitor is either (1) coated on to a transparent polypropylene (R.I. 1.49), cellulose triacetate (R.I. 1.49), polyvinyl chloride (R.I. 1.52), polymethylmethacrylate (R.I. 1.49) or polyvinyl alcohol (R.I. 1.51) film which is on the transparency and a polyester support with an epoxy resin adhesive layer laminated thereto or (2) poured on to a glass slide with spacers and an aluminium support with a coating of polyvinyl acetate and ferric oxide adhered thereto and then the transparent sheet and transparency placed thereon. The material as in (1) is uniformly exposed through the support and then imagewise exposed and developed to produce a printing plate. The material as in (2) is imagewise exposed and developed to produce a printing plate.
Patent GB-1372691-A (GB)
Title: Cigarettes
IPC: A24D1/02
Filed: 1971-08-11
Abstract: 1372691 Cigarettes MOLINS Ltd 11 Aug 1971 [12 Aug 1970] 38918/70 Heading A2C A filter cigarette comprises a tobacco portion 2 which is not substantially more than half the length of the whole cigarette and is enclosed in a wrapper of sheet material 12 with discrete preformed perforations in it, and a filter portion 4 which is axially spaced from the tobacco portion 2. The filter portion 4 may contain one or more filter sections, e.g. a paper filter 6 and a cellulose fibre wad 8, and may contain a radial or transverse flow type filter. The portions 2, 4 are joined by a metal strip uniting band 16, the space between them optionally being filled with a porous glass fibre wad fire barrier 10. The filter portion 4 is enclosed by a tube 14 having a stiff inner layer, e.g. of cardboard, overwrapped with thin paper, the end of the tube 14 contained within the uniting band 16 being impregnated with fire-resistant material. Preferably, the wrapper 12 has a relatively low chalk content, has a dark colour e.g. black, and is perforated by sparking.
Patent GB-1126157-A (GB)
Title: Internal combustion engine air intake control systems
IPC: F02M1/00
Filed: 1967-08-24
Abstract: 1,126,157. Air filter. GENERAL MOTORS CORP. 24 Aug., 1967 [29 Sept., 1966], No. 38969/67. Heading BIT. [Also in Division F1] A carburettor air filter 10 incorporates a valve 46 actuated by a vacuum motor 54 in response to intake manifold suction to control the admixture of hot air from an inlet 42 with ambient air from an inlet 34 the action of the suction on the motor 54 being modified by a temperature responsive air bleed valve 82 which bleeds air into the motor at a rate which increases with intake air temperature. The valve 46 is hinged at 48 and movable from a position closing the hot air inlet 42 to a position closing the cold air inlet 30. Intake manifold suction is conducted by a pipe 72 to a member 68 Fig. 3 (not shown) containing a restriction (74) and connected by a pipe 64 to the motor 54. The temperature responsive device bleeds air into the pipe 64 through pipe 76 and comprises a valve 88 Fig. 4, actuated by a bimetallic strip 90 situated in the filtered air chamber of the filter 10. At low temperatures valve 88 is closed, wherebymotor 54 actuates valve 46 to open the hot air inlet 42. With increasing temperature valve 88 is opened and valve 46 gradually closes inlet 42. A second ambient air inlet 32 is normally closed by a valve 50 actuated by vacuum motor 56 and opens at full throttle, conditions, the action of motor 56 being unaffected by the air bleed device 88.
Patent GB-1445101-A (GB)
Title: Counter balancing of vertically movable slides in machine  tools
IPC: B23Q11/00
Filed: 1972-08-22
Abstract: 1445101 Counter-balancing slides ALFRED HERBERT Ltd 28 Aug 1973 [22 Aug 1972] 38997/72 Heading B3B In a machine tool having a slide 10 movable on one side of a vertical slideway, a counterbalancing mechanism for said slide is provided comprising a mass 22 connected to the slide 10 by an elongate flexible connecting element 20, e.g. roller claim, which is connected to the side 10 through the intermediary of at least one lever 18 pivotally connected to the slide and carrying a slideway-engaging element which engages the other side of said slideway, whereby the mass not only exerts a weight counterbalancing force to the slide but also applies a horizontal force thereto to maintain the slide in slicling contact with the slideway. The vertical slideway comprise a pair of forwardly facing rails 12, (13) (Fig. 2, not shown) and a rearwardly facing rail 14. The lever 18 is pivoted from a bracket 17 on the slide so that it tends to rotate to press the said slideway-engaging element against the rail 14. The said engaging element may be a roller (19), a low-friction shoe, or a recirculating roller type linear bearing. The bracket 17 is U-shaped and embraces a web 15, so that there are two levers 18 and flexible elements 20. The lever 18 includes a plurality of attachment holes 18a to allow adjustment of the horizontal force. The slide 10 is a work slide of a boring machine.
Patent GB-1116281-A (GB)
Title: Improvements in or relating to seismic exploration
Inventor: PERKINS ALLAN JAMES
IPC: G01V1/112
Filed: 1965-09-13
Abstract: 1,116,281. Geophysical prospecting. McCOLLUM LABORATORIES Inc. 13 Sept., 1965, No. 39056/65. Heading H4D. [Also in Division F2] In a seismic prospecting system, a substantially monochromatic seismic pulse of short duration, suitable for distinguishing closelyspaced layers of sub-surface formations, is generated by applying a positive and a negative impulse to the ground in rapid succession. In the embodiment shown, a positive impulse is applied to the ground by the detonation of a gas mixture in a chamber 11 formed between a coupling-plate 1 and a reaction-mass piston 6. Piston 6 is supported by springs 7 in a casing 9 and is moved upwards, against the action of springs 8, by the detonation. The compression of springs 8 applies an upward force to casing 9 and hence a negative impulse to the ground. The upward movement of piston 6 uncovers ports 14 in the side walls of casing 9, through which combustion products are exhausted into chambers 16 and 18 which form a silencing system. A non-combustible gas is admitted through an intake 25 to flush out chamber 11 through narrow apertures 19 in piston 6. Chamber 11 is then recharged with combustible gases (e.g. propane and/or butane, together with air or oxygen) fed in through intakes 26, 27. Intakes 25, 26, 27 are provided with check valves 31, 32, 33 to prevent back-firing. Gas feed is controlled by solenoid valves, and detonation is initiated by a spark-plug 30. The solenoid valves and plug 30 are actuated in a timed sequence determined by a switching system coupled to a seismic wave recording device (preferably of the magnetic type). Successive records made by repeating the operating cycle of the vibrator may be composited to improve signal-to-noise ratio. Cool air fed into casing 9 through an intake 20 prevents overheating of the silencing chambers 16, 18 and prevents accumulation of explosive gases therein. The duration of the seismic pulse may be adjusted by varying the weight and dimensions of the reaction-mass piston 6, the size of the firing chamber 11, the positioning of the exhaust ports 14, the constants of springs 7 and 8, the timing, and the character and quantities of the combustible charge. In an alternative embodiment (not shown), the negative impulse may be generated by detonating a second charge above piston 6, rather than by springs 8.
Patent GB-1381970-A (GB)
Title: Pattern reading apparatus
IPC: G06V30/20
Filed: 1972-08-23
Abstract: 1381970 Character recognition systems INTERNATIONAL BUSINESS MACHINES CORP 23 Aug 1972 [30 Sept 1971] 39188/72 Heading G4R In a character recognition system in which the scanned field is divided by the scanner into a matrix of two-state elementary areas, each area is considered in turn and the state of that area is changed or not changed in accordance with information gained by examination of adjacent areas, independently of the actual state of the area. The system enhances the character pattern by eliminating spurious bits, and adjusting the stroke width towards a preset value, e.g. 2 or 3 bits. The signals from the scanner are read serially into a matrix shift register. The outputs of certain stages, corresponding to an n Î n mask of areas, pass to a computer which operates on the centre-most bit of the mask. As the signals step through the register the mask is effectively scanned over the matrix of areas. The computer first determines whether the centre bit is a " boundary " bit, i.e. whether any of the 8 adjacent bits is a 0-bit (background). If it is not, the centre bit is set in to an output matrix shift register as a 1-bit. On the other hand, if it is a boundary bit, the probability E that the surrounding pattern of black bits is not part of one of the features of a defined set of features (e.g. -, | , \, /) is determined, assuming the centre bit is white. The probability I that it is part of a feature, assuming the centre bit is black, is also determined. So-called " contrast " measurements are now made. These relate to the number B of 1-bits in the n x n mask, the average value S of the successive values B found during consideration of the centre bits forming the preceding scan line, the average value A of the values S obtained during a certain number of preceding scans, and the value #S between the present value of B and an adjacent value. The values A, S, and B are used in conjunction with E and I to develop a decision on the centre bit state. Thus, if E and I appear to indicate that the centre bit should be black it will in fact be made black only if the surroundings are dark. The value #S determines whether or not the character pattern shall be passed again through the system for further enhancement.